MEDIATED ELECTRON-TRANSFER BY A SURFACTANT VIOLOGEN BOUND TO OCTADECANETHIOL ON GOLD

被引：75

作者：

CREAGER, SE ^{[1
]}

COLLARD, DM ^{[1
]}

FOX, MA ^{[1
]}

机构：

[1] UNIV TEXAS, DEPT CHEM, AUSTIN, TX 78712 USA

来源：

LANGMUIR | 1990年 / 6卷 / 10期

关键词：

D O I：

10.1021/la00100a017

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The capacity of a self-assembled octadecanethiol layer on gold to block direct electron transfer to Ru-(NH3)63+ in aqueous solution is enhanced by the presence of the surfactants dodecyltrimethylammo-nium bromide and N-methyl-N-octadecyl-4,4'-dipyridinium dibromide (1). Reversible formation of a bilayer structure is postulated. The redox-active surfactant blocks direct electron transfer while simultaneously providing a pathway for mediated reduction via the viologen 2+/.+ redox couple. Contact angle and X-ray photoelectron spectroscopic (XPS) measurements indicate that the viologen moiety is buried within the interior of the assembly. © 1990, American Chemical Society. All rights reserved.

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页码：1617 / 1620

页数：4

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